TV Comebacks: Long-Gone Characters Who Should Return

Television Without Pity:
We were already enjoying Season 3 of The Walking Dead when the writers brought back Daryl's one-handed, loose-cannon brother Merle, now donning a knife at the end of his arm -- talk about a pleasant surprise! Meanwhile, Gossip Girl is calling back basically everyone who once graced our TV screens in preparation for the series finale. All that got us thinking: Why don't other shows return their beloved characters to us? Here's who we'd love to see back. Beware: Spoilers abound.